1. Three basic requirements for selecting the benchmark: (1) Selecting the benchmark should ensure that the workpiece positioning is accurate and convenient, convenient and reliable. (2) Select the size calculation of the benchmark and the size of each processing site. (3) Ensure the processing accuracy. CNC processing center machine tool

  2. 6 principles of the positioning benchmark: (1) Choose the design benchmark as the positioning benchmark as much as possible; (2) the positioning benchmark and the design benchmark cannot be unified, and the positioning error should be strictly controlled to ensure the processing accuracy of the processing; During processing, the selected benchmark can complete the processing of all key accuracy sites at a time; (4) the selected benchmark should ensure that the possible processing content may be completed; The benchmark of the knife of the workpiece coordinate system is overlap; (6) When multiple times, the benchmark should be unified. Determination of processing center fixture: 1. Basic requirements for clamps: (1) The clamping mechanism must not affect the entry, and the processing site must be open; (2) the fixture can achieve directional installation on the machine tool; (3) the rigidity and stability of the fixture is better. 2. Common fixture types: (1) GM fixture: such as tiger clamps, division heads, cards, etc.; (2) Combination fixture: The combined fixture consists of a set of universal component components that have been standardized and sized have been specified; (3 3 (3 3 ) Dedicated fixture: Special or similar processing and designing fixtures for a certain or similar process; (4) Adjustable fixture: The combination of a combination fixture and a special fixture can ensure the accuracy of the processing, and the fixture is more flexible; 5) Multi -site fixture: Plasgers of multiple workpieces can be installed at the same time; (6) Fittings: Specialized in the fiber of workpiece with similar shapes, similar sizes and positioning, clamping, and processing methods of the same or similar processing methods. CNC processing center machine tool

    3. Principles of the selection of processing center fixture: (1) Under the premise of ensuring processing accuracy and production efficiency, generally use general clamps; (2) Batch processing can consider using simple special fixtures; Plasses and high -efficiency air pressure, hydraulic pressure and other special fixtures; (4) The group clamp should be used when using a group process; The best way to install the workpiece on the machine tool workbench: The location of the workpiece clamp should be guaranteed to ensure that the workpiece is within the processing scope of each axis of the machine tool, and the length of the tool should be shortened as much as possible to increase the rigidity of the processing of the tool. CNC processing center machine tool